Home / 15,293.76-21,105.12-8,579.40

Finding the Fourth Proportional to 15,293.76, 21,105.12 and 8,579.40

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Solution

The fourth proportional to 15,293.76, 21,105.12 and 8,579.40 is: 11,839.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,293.76 : 21,105.12 = 8,579.40 : x
  2. Step 2: Convert to fraction form
    15,293.76/21,105.12 = 8,579.40/x
  3. Step 3: Cross multiply
    15,293.76x = 21,105.12 × 8,579.40
  4. Step 4: Simplify right side
    15,293.76x = 181,069,266.53
  5. Step 5: Solve for x
    x = 181,069,266.53/15,293.76
  6. Step 6: Final answer
    x = 11,839.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.